Dishwashing machine



' Oct. 1 7. 4

1,8 92 E. GILBERTsoN DISHWASHING kMACHINE Filed Oct. 15, 1925 Patented Oct. 18, 1927.

UNITED STATES PATENT OFFICE.

ELI GILBERTSON, OF FAIRCHILD, WISCONSIN.

This invention relates to dish washing machines and has for an important object thereof the provision of a device of this character which is very simple in its construction and operation and which will be eiiicient in the operation.

A further object of the invention is to provide a device of this character which will be substantially self-cleaning due to the arrangement of the various parts thereof.

These and other objects I attain by the construction shown in the accompanying drawing, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is a vertical sectional view through a. dish washing machine constructed in accordance with my invention;

Figure 2 is a` plan view of the bench for supporting the tub and the associated elements.

Referring now more particularly to the drawing, the numeral 10 indicates a circular tub or container, the side walls 11 of which are arcuately curved from top to bottom.

The bottom 12 of this tub drains to a central valve controlled outlet 13. Seated upon the bottom of the tub and held in spaced relation thereto by supports 14 is a cylinder 15, the bottom of which is open. This cylinder has arranged therein a piston 16, the rod 17 of which projects through the closed upper end 18 of the cylinder and has disposed thereabout a. compression spring 19. The upper end of this rod is provided with a fork 20, the purpose of which will presently appear. A stand is provided comprising an annulus 21 of angle iron, the vertically directed flange 22 of which is adapted to embrace the lower end of the side walls of the tub. while the horizontal flange 23 thereof is directed inwardly and receives the bottom 12 of the tub. This annulus is supported from suitable legs 24, extending radially of the annulus and secured to the horizontal ange 23 thereof are a pair of spaced brace irons 25. These irons parallel one another and at one side of the annulus have angular extensions 26 which are suitably braced, as at 27, to the annulus. The upper ends of the angular extensions 26 are formed to provide eyes throughwhich is directed a pivot bolt 28,.of a handle 29 which extends diametricalljvl f the `tub when the tub is in posif: tion and in the fork 2O at the uppers DISHWASHING MACHINE.

Serial No. 62,266.

eter of the tub and is formed at its free side to provide a projecting loop 31 which may be engaged with a spring retracted hook 32 carried by the annulus 21. A cover 33 is preferably provided for the tub, this cover having a central opening 34 through which the piston rod may extend.

In the use of the device, the dishes are placed within the tub about the sides of the cylinder 15, no racks whatever being provided for the dishes so that the washwater will be interfered with to the slightest possible extent. It is pointed out that with the construction above described, but a small amount of water need be placed in the receptacle with the dishes. This water, together with air` will be drawn up into the cylinder as the plunger is* raised and when the plunger is forced downwardly, will pass out between the dishes and striking the curved walls of the tub, will turn back over the top of the dishes returning to the bottom of the tub through the pile of dishes so that each dish is subjected to the action thereof. It will be obvious that this feature of the invention renders the same particularly desirable for use where conditions are such that water is hard to obtain. The curved walls of the tub will cause this water to swirl about the dishes contained within the tub so that they will be thoroughly cleansed. These curved walls will also permit the water to have full action against the walls of the tub and the exterior surface of the cylinder so that these walls will be kept clean and their grease and dirt removed from the dishes may be drained with the water from the outlet 13.

Since the construction hereinbefore set forth is obviously capable of a certain range of change and modification without materially de arting from the spirit of the invention, I o not limit myself to such specific.' Structure except as hereinafter claimed;

I claiinf--L washing machines el.' i v tieally extending cylinder in the tub and mally urging the piston upwardly, Seid supported in' spaced relationlto the bottom of spring maintaining theV base of the fork of the tu'b, a piston Within the cylinder, means the piston rod vin engagement With the under l0 for reciprocating the piston comprising it surface of the lever.

ivoted lever, a rod forth'e piston .having a In testimony whereof I hereunto aix my Ork at its upper end to loosely receive the signature. y lever intermediate its ends and a spring 4nor- ELI GILBERTSON. 

